Improvement in hook-drills



@initrd Samira 'tiniest' 'tira 4n'rnnhnn OSTERKAMP; or escnwnitnn CITY, Prussia.

Letters Patent No. 106,197, dated Angust 9, 1870.

rMPRovEMnN'r m noos-omnes.

The Schedule referred in these 'Il/letters Patent and making part of the same.

To all whom it may concern Be itl known. that I, HERMANN Os'rnnKAMr, of

`particularly specified in the claim, wherebythe drill is rcciprocated and rotated in an eiicient manner, the construction of the machine being comparatively sim- `ple, the cost small, and the liability of the same gettingout of order very slight.

1n the accompanying drawing- `Figure. 1 represents a longitudinal sectionvof my improved rock-drill. y f

Figure 2 is a side view of the saine. Y, Figure 3'is atransverse section of the same, taken on the line a: x, iig. 4 y

Figure 4 is a transverse section of the same, taken ou the line y y,`fig. `1.

Figure '5 is a transverse section of the same, taken on the line z z, fig. 1. i Figure 6 is a side view, on a re'duced scale, of the same, showing it set up.

Figure 7 is a front view of the same set up.

Similar letters of reference indicate corresponding Ain the drawing represents the main cylinder of my improved atmospheric drill.

`Wit-hin it is arranged a piston, B, which is fastened to a pistonrod, C, as shown.

The piston-rod projects through the lower end of y the cylinder Aand'is packed in a stuffing-box, a,

that is arranged therein, as shown iu fig. 1. i

The piston is cansedto work tight in the cylinder by means of'packingLringS, b b, formed or applied l -around it. I v

The drill D is secured to the outer endv of the piston-rod.

In the upper end or head c of the cylinder is formed ,the steam-tiglitbeai'ing of a shaft, E. which has its I inner end made of square or polygonal cross-sections, yas shown in fig; 5.- With this square end the shaft y i The arburfhas its bearings in ears, g, that project from the upper'end of the cylinder.

Upon the arbor f are mounted two ratchet-wheels,

g g, which are revolved by pawls, h h, as hereinafter more fully described, so that, .by their rotation, the

shaft E may be also turned to revolve the piston, piston-rod, and drill.

The last-named three part-s are, while being thus turned, free to move longitudinally on the squared ,part of the shaft E.

Upon the cylinder A is secured another smaller cyliuder, F, whch contains, also, a packed piston, G, on apiston-rod, H.

The lower part 0f the pistou-rod H passes through a packing-box,` i, while that portion l which projects from the upper face of the piston fits tight into a smallcrvportion of the cylinder F, as shown.

There are two portsl or apertures, j and k, cut through the upper part lof the pistou G, asshown.

When the two aforesaid vpistons B G are in the highest position, as in fig. 1, and when, then, the compressed air is allowed to enter the smallercylinder F,

through a pipe, m., g. 3, such air will pass through the aperture j and through a port, n, into the large cylinder, pushing the pistou B downward and forward.

After the piston B has been thus moved a certain distance, it will lay open the port o, through which the air will pass into the small cylinder, directly ahead of the piston G, pushing the same also down. ward;l thereby the other aperture 7c is bronghtin line withr a discharge-opening, p, in the small cylinder, allowing the air formerly applied to the moving of the piston to escape. Thereby the `compressedair which was admitted into the lower part of the large cylinder, through the opening channel fr, is allowed to force the piston B upward again. v

The surface against which the air, pressing upward, acts, is smaller on account of the thickness of the piston-rod C, than that against which the air acts while pressing such pistou down. The air in the lower part of the cylinder can, therefore, not prevent the downward passage of the pistou. f

\Vhen the piston B, during its upward motion, has cleared the ports, the air enters also the lower end of the small cylinder, and forces the piston G upward until the aperture j is again in line with the port n.'

The downward motion ofthe pistons is then again resumed, as aforesaid. n

The pawls hare pivoted to the upper end of the rod l, aud'serve to couvert the reciprocating motion of said rodinto rotary motion of the arbor f, shaft E, piston-rod G,.and drill D. The latter is thus revolved, and, by the mot-ion of thepistou B, also moved back and forth.

A click, t, on the tube F, holds the wheels g from turning backward.

The apparatus above described is, by a dovetailed projection, u, fastened to a block',}1, which slides on n frame, J, being moved therefrom 4by means of n rrnnk and screw, V, as indicated in iig. 6.

The frxme J is supported by one or more extensionlegs, L, und lil-ld in any suitable position hy moons of :n projecting pointed arm, w.

By this construction of frame, the drill cnn be heid in any desired position and direction for opemtion.

Having thus described my invent-ion,

I clniin :1s new and desire to secnrc hy Letters Pntent- The improved drill, formed by the combination o' the cylinders A and F, pistons B G, :mdtheir rods.

The above specification of my invention signed by me this 7 th dny of December, 1869.

y HERMANN OSTERKAMP. Witnesses:

CHARLES' HABER, ANDREAS HUTH.- 

